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Thread: Searching with keywords in a sentence

  1. #1
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    Default Searching with keywords in a sentence

    Hi everyone...
    My question is related to deleting some unwanted words in a sentence like is,am,are,has,have,had,should,would and many more like these. Basically when user inputs a sentence in search box in order to search something, then program also shows the search related to above mentioned helping verbs and resultantly shows more results. So I want to delete all these words from a sentence to keep my search fast and accurate. If I use if-else or switch then I have to mention all helping verbs, which looks very odd in program and how many words I would have to handle. Is there any good and efficient way to handle this situation?
    For example:
    User inputs a sentence in search box "Is there any example of delete query"
    There are only 3 keywords in the sentence i.e example, delete and query.
    Thanks


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: Searching with keywords in a sentence

    Yeah, there is an easier way to do it:

    1. Create a set of words you want to ignore
    2. Split the query by word
    3. For each word in the query, see if it is in the set of words to ignore. If it is, ignore it
    4. Run your search using any keywords which weren't ignored

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    Default Re: Searching with keywords in a sentence

    You mean like this.........
    But look at If Condition is too long. Is it a good approach?

    class removeIsAmAre{
    	public static void main(String args[]){
    		String sentence = "this is am are would should has have had a sentence completion";
    		String[] words = sentence.split(" ");
    		int lenArr=words.length;
    		for(int i=0;i<lenArr;i++){
    			//remove is, are, am, has, have, had, he, she, it,,him, her, his, they, would, should, a, this, that
    			if(words[i].equals("a") || words[i].equals("is") || words[i].equals("this") || words[i].equals("am") || words[i].equals("are")|| words[i].equals("her") || words[i].equals("this") || words[i].equals("that") || words[i].equals("had") || words[i].equals("would") || words[i].equals("should") || words[i].equals("has") || words[i].equals("have") || words[i].equals("he") || words[i].equals("she") || words[i].equals("it") || words[i].equals("they")){
    				words[i]="";
    			}
    		   System.out.println(words[i]);
    		}
    	}
    }

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    Super Moderator Norm's Avatar
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    Default Re: Searching with keywords in a sentence

    Put the words in a list or array and loop through that instead of that monstrous if statement.

    Please edit your post and wrap your code with code tags:
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Searching with keywords in a sentence

    Your if-statement is insanely large and impractical, especially if you want to compare more words. Instead, use another array or an arraylist, such as:

    public class TestSentence {
        public static void main(String[] args) {
            String sentence = "this is am are would should has have had a sentence completion";
            String[] words = sentence.split(" ");
            String[] wordsToCompare = {"a", "is", "this", "am", "are", "her", "that", "had", "would", "should", "has", "have", "he", "she", "it", "they"};
            // outer loop that runs through the words array
            // nested loop that runs through the wordsToCompare array
            // compare if each element matches and do something, otherwise if they don't match, do something else
            // print
        }
    }

    import java.util.Arrays;
    import java.util.ArrayList;
     
    public class TestSentence {
        public static void main(String[] args) {
            String sentence = "this is am are would should has have had a sentence completion";
            String[] words = sentence.split(" ");
            ArrayList<String> wordsToCompareList = new ArrayList(Arrays.asList("a", "is", "this", "am", "are", "her", "that", "had", "would", "should", "has", "have", "he", "she", "it", "they"));
            // use the same logic for looping as above

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